Prior to 1996, boat builders could order there engine packages from Mercruiser either with, or without, power steering on them. This saved them a few dollars, if they only needed the one power-steering equipted engine on a twin installation, as this is all thats needed, and how every performance boat builder plumbed their steering. Then Merc began only selling their engine packages with power-steering, without a choice of with or without. Some builders removed the reduntant pump/pulley/belt/power-steering cylinder/hoses assembly, & install a correct length belt, for a cleaner installation. Others opted to just leave everything alone, & just let it go along for the ride, not hooked up to anything, as it is not needed. Then others, went to the trouble of installing a Mercruiser priority valve & hose system to allow full-time use of both power-steering pumps. Very few builders went this last route though.